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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
PSU and RSU Share Activity [Table Text Block] | The following summarizes the activity of our PSUs and RSUs awarded under the 2013 Incentive Plan for the nine months ended September 30, 2014:
| PSUs |  | RSUs
| Number of shares |  | Weighted Average Grant-Date Fair Value |  | Number of shares |  | Weighted Average Grant-Date Fair Value
Outstanding, December 31, 2013 | 90,124 |  |  | $ | 26.65 |  |  | 14,161 |  |  | $ | 26.65 |
Performance true-up | 10,767 |  |  | 26.65 |  |  | — |  |  | — |
Vested | (55,619 | ) |  | 26.65 |  |  | (14,161 | ) |  | 26.65 |
Granted | 100,692 |  |  | 30.32 |  |  | 125,661 |  |  | 30.26 |
Forfeited | (7,968 | ) |  | 28.93 |  |  | (10,225 | ) |  | 30.32 |
Outstanding, September 30, 2014 | 137,996 |  |  | $ | 29.20 |  |  | 115,436 |  |  | $ | 30.25 |
Stock Option Activity [Table Text Block] | The following is a summary of our stock option activity for the nine months ended September 30, 2014:
| Number of Options |  | Weighted Average Exercise Price Per Option |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value
|  |  |  |  | (years) |  | (thousands)
Outstanding, December 31, 2013 | 161,257 |  |  | $ | 27.19 |  |  |  |  |
Exercised | (3,019 | ) |  | 27.19 |  |  |  |  |
Cancelled/Forfeited | (11,627 | ) |  | 27.19 |  |  |  |  |
Outstanding, September 30, 2014 | 146,611 |  |  | $ | 27.19 |  |  | 8.4 |  | $ | 433 |
Vested and expected to vest, September 30, 2014 | 135,996 |  |  | $ | 27.19 |  |  | 8.4 |  | $ | 401 |
Exercisable, September 30, 2014 | 50,107 |  |  | $ | 27.19 |  |  | 8.4 |  | $ | 148 |
Stock-Based Compensation Expense Recognized [Table Text Block] | Total stock-based compensation recognized from PSUs, RSUs, and stock options net of estimated forfeitures, was as follows:
| Three Months Ended September 30 |  | Nine Months Ended September 30
| 2014 |  | 2013 |  | 2014 |  | 2013
| (thousands)
PSUs | $ | 1,152 |  |  | $ | 511 |  |  | $ | 2,202 |  |  | $ | 1,205 |
RSUs | 550 |  |  | 81 |  |  | 1,434 |  |  | 192 |
Stock options | 174 |  |  | 197 |  |  | 550 |  |  | 465 |
Total | $ | 1,876 |  |  | $ | 789 |  |  | $ | 4,186 |  |  | $ | 1,862 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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